Struct QueryStats 

pub struct QueryStats {

    pub elapsed_s: f64,
    pub commit_time_s: Option<f64>,
    pub time_to_schedule_s: Option<f64>,
    pub pre_execution: Option<PreExecutionStats>,
    pub execution: Option<ExecutionStats>,
    pub result_size_mb: Option<f64>,
    pub peak_result_buffer_memory_mb: Option<f64>,
    pub plan_cache_status: Option<String>,
    pub plan_cache_hit_count: Option<u32>,
    pub statement_type: Option<String>,
    pub rows: Option<u64>,
    pub cols: Option<u32>,
    pub query_truncated: Option<String>,
}

Detailed statistics for a single query execution.

All time fields are in seconds. Memory fields are in megabytes. Fields are Option because not all queries produce all stats (e.g., a simple SET command won’t have execution storage stats).

Fields

elapsed_s: f64

Total elapsed wall-clock time for the query (seconds).

commit_time_s: Option<f64>

Time spent committing the transaction (seconds).

time_to_schedule_s: Option<f64>

Time waiting to be scheduled on a worker thread (seconds).

pre_execution: Option<PreExecutionStats>

Pre-execution phase stats (parsing, compilation).

execution: Option<ExecutionStats>

Execution phase stats (runtime, CPU, storage I/O).

result_size_mb: Option<f64>

Size of the result set sent to the client (MB).

peak_result_buffer_memory_mb: Option<f64>

Peak memory used by the result buffer (MB).

plan_cache_status: Option<String>

Plan cache status: “cache miss”, “cache hit”, “not run yet”, etc.

plan_cache_hit_count: Option<u32>

Number of times the cached plan was reused.

statement_type: Option<String>

Statement type: “SELECT”, “INSERT”, “SET”, “ATTACH”, “PREPARE”, etc.

rows: Option<u64>

Number of result rows.

cols: Option<u32>

Number of result columns.

query_truncated: Option<String>

Truncated query text (as logged by Hyper).

Trait Implementations

impl Clone for QueryStats

fn clone(&self) -> QueryStats

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for QueryStats

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for QueryStats

fn default() -> QueryStats

Returns the “default value” for a type.